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What's this? Yes, Gremlin Graphics have a new utilities label - Discovery. Andrew Wilton admires Pyradev, a suite of programs that give you - a software developement system.

If you want to be a machine-code wizard, it'll take more than a big book or two - you're going to need some utilities. With this new development package on Gremlin's Discovery label you can get all the tools for the job in one go.
The system consists of five separate modules - editor, assembler, monitor, "Disk-Nurse" and file-manager - all accessed via a central menu. The last of these is a straightforward copy/delete/rename utility - this could come in handy, smce Pyradev runs under AMSDOS rather than CP/M. 

The full-screen editor, used to enter and edit source code, is probably the weakest of the main programs - it isn't particularly bad, but it does lack the thoroughness evident in the rest of the system. The problem is quite simple - all editing has to be done in overwrite, rather than the more normal insert, mode. If you accidentally omit a character the only solution is to insert a space using, and overwrite it with the appropriate character While this isn't a serious problem, it is unnecessary and annoying - not least because it mars an otherwise impressive package. Indeed, the editor itself is fast and powerful m most respects, so it's an unfortunate omission all round.

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The assembler, on the other hand, has just about everything you could wish for macros, conditional assembly, undocumented instructions, the lot. It runs at a healthy speed, even when it's outputting the source to screen. It can link enormous source files -up to 992K on a two-drive system - and write the resulting machine code to disk in AMSDOS or CP/M transient command format. The extra RAM of a 6128 or an expanded 64K machine is used to speed the assembly process up, by cutting down the need for disk access. There's really not much more an assembler could have -there's no parenthesis or operator precedence in its expression set. but that's about it.


The monitor/disassembler is a similarly thorough piece of work.
It's relocatable, and can be loaded in cut down form where space is at a premium. It can load test code from tape or disc, and has a good range of debugging aids - single and double stepping, register display and alteration, and up to five break points. Memory can be altered and searched, entry in each case being possible in either hex or ASCII. Search string entry is a bit unfriendly and the docu- I mentation fails to point out a couple of pitfalls - namely that the routine will quite cheerfully find its own copy of the search string, or worse still a copy in, e.g. screen memory, which it then destroys. These aren't really problems as such, but a warning in the user manual would avoid confusion.


This is straightforward, though lacking a few features that you might have found helpful - it won't follow jumps, for one thing. Y ou can disassemble to your screen, printer or - very usefully - to a disc file. Automatic labelling with the latter makes editing and reassembly not only feasible but reasonably easy. Bank switching, block move and saving to tape/disc round off this impressive module.

Disk Nurse

Lastly, Disk Nurse allows you to inspect the contents of a disc, unerase files, search, modify and copy disc sectors directly - in short, it is a powerful utility, invaluable for the hackers and hands-on programmers among you.

The Verdict

So, a strong package which should give you all the programming power you need. The price is very reasonable considering what you actually get - a complete development system - and bearing in mind the price of the Z80 manual and firmware guide you'll also need to buy. Beginners may find the documentation c little unhelpful, but this is nothing unusual - and in any case, Discovery have thoughtfully included three sample source files which double as self-teaching aids. Occasional errors aside, experienced users will find little to grumble about -ÃéÂØ technical points are covered quite well, and the monitor notes are particularly helpful. 


★ PUBLISHERS: Gremlin Graphics , Profisoft (GERMANY)
★ YEAR: 1986
★ CONFIG: ???
★ AUTHOR: Todd Osterlind / DISCOVERY
★ PRICE: £29.95 (UK) ; 119 - DM (DISK/GERMANY)


» Pyradev  Plus  v1.0    ENGLISHDATE: 2013-09-03
DL: 123 fois
SIZE: 233Ko
NOTE: Include CPM bootloader/40 Cyls

» Pyradev    ENGLISHDATE: 2013-09-03
DL: 100 fois
SIZE: 107Ko
NOTE: 40 Cyls

» Discovery-Pyraddev-Pyraword-The  Code  Machine-EMU-The  AnimatorDATE: 2015-01-08
DL: 187 fois
TYPE: image
SIZE: 223Ko

» Pyradev  PlusDATE: 2015-01-08
DL: 134 fois
TYPE: image
SIZE: 87Ko

» Pyradev  Plus  (Release  DISC)    (Binder)    ENGLISHDATE: 2018-12-17
DL: 43 fois
TYPE: image
SIZE: 73Ko
NOTE: Uploaded by hERMOL ; w765*h953

» Pyradev    ENGLISHDATE: 2014-05-05
DL: 123 fois
TYPE: image
SIZE: 393Ko
NOTE: w1230*h808

» Pyradev  Plus  (Release  DISC)    ENGLISHDATE: 2018-12-17
DL: 35 fois
TYPE: image
SIZE: 11Ko
NOTE: Uploaded by hERMOL ; w281*h362

» Pyradev    (Release  DISC)    ENGLISHDATE: 2015-11-11
DL: 96 fois
TYPE: image
SIZE: 65Ko
NOTE: Scan by Loic DANEELS ; w928*h586

Manuels d'utilisation & docs:
» Pyradev    (Instruction  Booklet)    ENGLISHDATE: 2014-05-05
DL: 78 fois
SIZE: 22739Ko

» Pyradev    (Simple  Debug  Routine)    ENGLISHDATE: 2014-05-05
DL: 96 fois
SIZE: 480Ko

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» Applications » Label Basic (CPC Amstrad International)
» Applications » Catalogue to Variables
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» Applications » Panacea assembler


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L'Amstrad CPC est une machine 8 bits à base d'un Z80 à 4MHz. Le premier de la gamme fut le CPC 464 en 1984, équipé d'un lecteur de cassettes intégré il se plaçait en concurrent  du Commodore C64 beaucoup plus compliqué à utiliser et plus cher. Ce fut un réel succès et sorti cette même années le CPC 664 équipé d'un lecteur de disquettes trois pouces intégré. Sa vie fut de courte durée puisqu'en 1985 il fut remplacé par le CPC 6128 qui était plus compact, plus soigné et surtout qui avait 128Ko de RAM au lieu de 64Ko.